As the radical militant group marched across Syria and Iraq this past summer its message was convert or be killed. For many, the refusal to swear faith to the group and adopt its repressive and violent ideology meant being fatally shot.
However, some imprisoned women and children who refuse to convert have faced a fate some might consider worse than being killed.
By the latter part of August, the militant group had abducted as many as 2,500 civilians from Iraq, most being women and children. This data is according to a new report by the United Nations based upon over 450 interviews with different witnesses.
Some of the women were awarded to the Islamic State fighters, while others were sold in markets in Raqqa, Syria and Mosul, Iraq as slaves.
A number of reports came from a Mosul office where women and girls were given a price tag and offered to buyers.
Some women have been reportedly sold to men to entice them to fight for the radical militant group.
One girl, who is Yazidi, told the United Nations she had been imprisoned after the Islamic State attacked her village on August 3. She told the UN she had been raped a number of times, before being sold in the market.
Another incident took place in early August, when as many as 500 women were captured by the Islamic State while going through a village of Yazidi in northwest Iraq.
A few days later 150 of the women, mostly from communities of Christians and Yazidi were awarded as sex slaves or sold to fighters from the Islamic State in Syria.
Women who were married who did not convert were awarded to militant fighters as their wives after the Islamic State said their marriages were not recognized under Islamic law.
To increase its ranks, the militant group is recruiting boys who are just teenagers some of whom are no older than 13.
Witnesses have seen the boys dressed as fighters carrying weapons and wearing masks. They are with fighters to guard prisoners and on patrols.
Some of the teens were forcibly recruited and sent by the Islamic State to the front lines as a way to shield militants in the fighting, said the report.
Others had been forced to make blood donations to treat the fighters who were injured, according to some boys who were able to escape.